Abstract
Objective: To identify factors associated with the efficacy of botulinum toxin-A (BoNT-A) injections. Methods: Thirty-eight children with spastic cerebral palsy (CP) received BoNT-A injections into the gastrocnemius. The baseline anti-botulinum antibodies were checked. The Static dorsiflexion range of motion (ROM), Modified Tardieu Scale (MTS) and Physician Rating Scale (PRS) were assessed at pre-injection as well as 4- and 12-week post-injection. Results: No samples contained anti-botulinum antibodies. Greater baseline MTS dynamic range was associated with greater changes in MTS dynamic ranges at 4-week post-injection. More frequent physical therapy was associated with greater changes in static dorsiflexion ROM at 4-week post-injection and greater changes in PRS at 4- and 12-week post-injection. Conclusion: The improvement in PRS at 12-week post-injection was associated with the frequency of physical therapy. Therefore, intensive physical therapy programs may be necessary to maintain the beneficial effects of BoNT-A injections in children with CP.
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